Protector for bit points



De c. 13, 1927.

R. J. LEWIS PROTECTOR FOR BIT POINTS Filed April '4', 1927' 1 v z E/VTOR e W/S A TTOILGFE4- usual constructionand design of cutters Patented Dec. 13, 1927.

UNITED STATES PATENT; OFFICE.

:aoY J. miwIs,

OF FORT WAYNE,'I1\TDIANA, ASSIGNOR 01F ONE-HALF TO JAY H. LEWIS,

OF GRAND RAPIDS, MICHIGAN.

raoci'ne'roa non BIT POINTS.

Application filed April 4,

vention is illustrated in the accompanying drawing, in which:

Fig.1 1s a sectional v ew taken on line 1-1of Figs. 3 and 4:, showing one of my impro'ved point protectors in place on a bit.

Fig. 2 is a detail view of the same in process or application to the bit point.

Fig. 8 is a detail view of the bit point protector removed from the bit.

Fig. 4; is ELbOttOHl view of the same.

Referring to the drawing, 1 is a bit of 2 is my improved bit point protector point. r

heavy body portion and a tubular having a wall 3 forming a socket & which receivesthe end of the bit. There is an upwardly projecting boss 5 at the center which contains a tapered screw-threaded'hole 6 entirely therethrough to receive the screw point of the bit. An aperture 7 extending from the bottom' of the screw-threaded part to the outside facilitates manufacture and afiords means for readilycleaning the same. The outside or my bit point protector is preferably knurled.

In use it will be noted that the cutters of the bit are introduced into a close fitting cylindrical socket and are thereby protected, and as the screw point of the bit screws into the hole it affords a strong support for the center part of the bit, thus supporting the cutat the 1927. Serial No. 180,879.

ters in spaced relation out of contact and in protected relation to the shell.

My improved protector is an exact fit for the particular bit that is being protected and effectively guides the same to place, as seen 4:, in Fig. 2. The protector when turned tight ontothe point of the bit, due to the taper remains there very securely and the bit can be thrown into a tool .1307; without any danceive the screw pointed tip of the bit and en-. J

case the cutters at the sides in spaced relato 20:11 from the bottom of the socket, as speci- 2. A bit point protector comprising a shell with heavy body and cylindrical side walls forming a socket for the end of the bit, and as a boss at the center of the socket containing a tapered threaded hole to receive the screw pointed tip of the bit and encase the cutters at the sides in spaced relation from the bottom of the socket, as specified.

3. A bit point protector comprising a shell with a head body and cylindrical side walls forming a socket for the end of the bit, having a tapered threaded hole to receive the screw pointed tip of the bit and encase the cutters at the sides, as specified.

In Witnesswhereof I have hereunto set my hand.

ROY J. LEWIS. 

